Anti-backflow fire-retardant breather valve

Abstract

The utility model discloses an anti-backflow fire-retardant breather valve, and relates to the technical field of fire-retardant breather valves. A liquid outlet pipe is in threaded fit with a liquid outlet of the valve body, a liquid receiving funnel is fixed in the liquid outlet pipe, a guide barrel is connected in the liquid outlet pipe, a sliding rod is in sliding fit with the interior of the guide barrel, a baffle corresponding to the liquid receiving funnel is arranged at the end, extending out of the guide barrel, of the sliding rod, and a sliding plate is in sliding fit with the interior of the guide barrel; the bottom end of the guide barrel is rotationally matched with an adjusting handle bolt in threaded fit with the sliding plate. Liquid in the valve body is discharged into the liquid outlet pipe, the baffle is pushed to slide to compress the spring to be discharged, when the liquid flows back, and the countercurrent pressure is larger than the valve body discharging pressure, the spring pushes the baffle to block the liquid receiving funnel, and then the probability that the liquid at the bottom end of the liquid outlet pipe flows back to the valve body is reduced; the adjusting handle is rotated to drive the sliding plate to slide, so that the compression amount of the spring is increased to compensate the sealing effect of the baffle on the liquid funnel.

Description

Technical Field

[0001] The utility model belongs to the field of fire-blocking breathing valves, and specifically relates to an anti-backflow type fire-blocking breathing valve. Background Art

[0002] The fire-blocking breathing valve can play the role of fire-blocking and air-supplementing, and is a kind of protective equipment. Because it is connected to the exhaust pipe, when the one-way valve inside the fire-blocking breathing valve is opened, there is a risk that the condensed liquid in the exhaust pipe will enter the tank through the fire-blocking breathing valve and contaminate the materials in the tank.

[0003] A Chinese patent with announcement number CN218236288U discloses an anti-backflow fire-blocking breathing valve, including a valve body, an exhaust port is provided on the valve body, a liquid discharge port is provided at the bottom of the exhaust port, a liquid outlet is connected to the liquid discharge port, a conduit is fixed to the inner upper end of the liquid outlet through a plurality of ribs, a liquid receiving funnel is fixed to the inner lower end of the liquid outlet, a guide cap is fixed at the lower end of the conduit, a guide shaft slidably connected to the guide cap passes through the guide cap, the upper end of the guide shaft extends into the conduit and is fixed with a limiting block, the lower end of the guide shaft is fixed with a blocking plate matching the lower end of the liquid receiving funnel, and a spring is sleeved on the guide shaft and located between the limiting block and the guide cap. The anti-backflow type fire-blocking breathing valve described in the utility model can automatically discharge the condensed liquid in the exhaust pipe to prevent the condensed liquid from backflowing into the tank body and contaminating the material in the tank body. However, the anti-backflow type fire-blocking breathing valve in this application uses a plugging plate to seal the liquid receiving funnel through spring tension. Since the spring is in a stretched state for a long time, elastic fatigue is easily generated, resulting in the need to frequently replace the spring, which increases the workload of the staff and the operating cost of the fire-blocking breathing valve.

[0004] In view of this, the present utility model is proposed. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide an anti-backflow type fire-blocking breathing valve.

[0006] In order to solve the above technical problems, the basic concept of the technical solution adopted by the utility model is:

[0007] A backflow-proof fire-blocking breathing valve comprises a valve body, a liquid outlet pipe is threadedly fitted at the valve body discharge port, a liquid receiving funnel is fixed in the liquid outlet pipe, a guide barrel is connected in the liquid outlet pipe, a sliding rod is slidably fitted in the guide barrel, a baffle corresponding to the liquid receiving funnel is arranged at one end of the sliding rod extending out of the guide barrel, a sliding plate is slidably fitted in the guide barrel, an adjusting handle bolt which is threadedly fitted with the sliding plate is rotatably fitted at the bottom end of the guide barrel, and a spring is arranged between the sliding plate and the sliding rod.

[0008] Optionally, the baffle is a truncated cone structure, the spring is sleeved on the adjusting handle bolt, the liquid receiving funnel is an inverted hollow truncated cone structure, a plurality of reinforcing rods are provided between the guide barrel and the inner wall of the liquid outlet pipe, and a plurality of reinforcing rods are arranged in a circular array between the guide barrel and the inner wall of the liquid outlet pipe. By setting the baffle to a truncated cone structure, the sealing effect of the baffle connecting to the liquid funnel can be improved.

[0009] Optionally, a retaining ring is provided on the outer fixed sleeve of the guide barrel, and the height of the upper side of the retaining ring gradually decreases from the inner wall to the outer wall, so as to increase the backflow resistance through the retaining ring.

[0010] Optionally, the sliding plate and the sliding rod are provided with guide notches on the sides, and the inner wall of the guide barrel is provided with guide strips. The sliding plate and the sliding rod are slidably fitted on the guide strips through the guide notches, so as to facilitate the sliding of the sliding plate and the sliding rod through the guide strips.

[0011] Optionally, a mounting hole is provided at the bottom of the guide barrel, a bearing is provided in the mounting hole, a smooth curved surface is provided on the outer side of one end of the adjusting handle bolt, and one end of the adjusting handle bolt is fixed in the bearing, so as to improve the rotation stability of the adjusting handle bolt through the bearing.

[0012] After adopting the above technical solution, the utility model has the following beneficial effects compared with the prior art. Of course, any product implementing the utility model does not necessarily need to achieve all the advantages described below at the same time:

[0013] The liquid in the valve body is discharged into the liquid outlet pipe, pushing the baffle to slide and compress the spring to discharge the liquid. When the liquid flows back and the backflow pressure is greater than the discharge pressure of the valve body, the spring pushes the baffle to block the liquid receiving funnel, thereby reducing the probability of liquid at the bottom of the liquid outlet pipe flowing back to the valve body. When the spring becomes elastically fatigued, the adjusting handle bolt is turned to drive the sliding plate to slide, thereby increasing the compression of the spring to compensate for the sealing effect of the baffle connecting the liquid funnel.

[0014] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described below are only some embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of an embodiment of the utility model;

[0017] Figure 2 This is a schematic cross-sectional view of an embodiment of the utility model;

[0018] Figure 3 This is a schematic cross-sectional structural diagram of a guide barrel according to an embodiment of the utility model;

[0019] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0020] Valve body 1, liquid outlet pipe 2, liquid receiving funnel 3, guide barrel 4, bearing 401, sliding rod 5, baffle 6, sliding plate 7, adjusting handle bolt 8, spring 9, reinforcing rod 10, baffle ring 11, guide notch 12, guide strip 13.

[0021] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0022] The utility model will now be further described in detail with reference to the accompanying drawings.

[0023] See also Figure 1-3 As shown, in this embodiment, a backflow-proof fire-blocking breathing valve is provided, including a valve body 1, a liquid outlet pipe 2 is threadedly fitted at the discharge port of the valve body 1, a liquid receiving funnel 3 is fixed in the liquid outlet pipe 2, a guide barrel 4 is connected to the liquid outlet pipe 2, a sliding rod 5 is slidably fitted in the guide barrel 4, and a baffle 6 corresponding to the liquid receiving funnel 3 is provided at one end of the sliding rod 5 extending out of the guide barrel 4, a sliding plate 7 is slidably fitted in the guide barrel 4, and an adjusting handle bolt 8 threadedly fitted with the sliding plate 7 is rotatably fitted at the bottom end of the guide barrel 4, and a spring 9 is provided between the sliding plate 7 and the sliding rod 5.

[0024] The liquid in the valve body 1 is discharged into the liquid outlet pipe 2, pushing the baffle 6 to slide and compress the spring 9 to discharge the liquid. When the liquid flows back and the backflow pressure is greater than the discharge pressure of the valve body 1, the spring 9 pushes the baffle 6 to block the liquid receiving funnel 3, thereby reducing the probability of the liquid at the bottom of the liquid outlet pipe 2 flowing back to the valve body 1. When the spring 9 shows elastic fatigue, the adjusting handle bolt 8 is turned to drive the sliding plate 7 to slide, so as to increase the compression amount of the spring 9 to compensate for the sealing effect of the baffle 6 on the liquid receiving funnel 3.

[0025] The baffle plate 6 of the present embodiment is a truncated cone structure, the spring 9 is sleeved on the adjusting handle bolt 8, the liquid receiving funnel 3 is an inverted hollow truncated cone structure, a plurality of reinforcing rods 10 are provided between the guide barrel 4 and the inner wall of the liquid outlet pipe 2, and the plurality of reinforcing rods 10 are arranged in a circular array between the guide barrel 4 and the inner wall of the liquid outlet pipe 2. By setting the baffle plate 6 to a truncated cone structure, it is convenient to improve the sealing effect of the baffle plate 6 on the liquid receiving funnel 3, and it is convenient to install the guide barrel 4 on the inner wall of the liquid outlet pipe 2 through the reinforcing rods 10.

[0026] A retaining ring 11 is provided on the outer fixed sleeve of the guide barrel 4 of this embodiment. The height of the upper side of the retaining ring 11 gradually decreases from the inner wall to the outer wall, so as to increase the backflow resistance through the retaining ring 11 and reduce the probability of backflow into the valve body 1.

[0027] The sliding plate 7 and the sliding rod 5 of this embodiment are both provided with guide notches 12 on their sides, and the inner wall of the guide barrel 4 is provided with guide strips 13. The sliding plate 7 and the sliding rod 5 are slidably fitted on the guide strips 13 through the guide notches 12, so that the sliding plate 7 and the sliding rod 5 are guided to slide through the guide strips 13, thereby improving the sliding stability of the sliding plate 7 and the sliding rod 5.

[0028] A mounting hole is provided at the bottom end of the guide barrel 4 of this embodiment, and a bearing 401 is provided in the mounting hole. A smooth curved surface is provided on the outer side of one end of the adjusting handle bolt 8, and one end of the adjusting handle bolt 8 is fixed in the bearing 401, so as to improve the rotation stability of the adjusting handle bolt 8 through the bearing 401, and to improve the sliding stability of the sliding plate 7 driven by the adjusting handle bolt 8.

[0029] Working principle: the liquid in the valve body 1 is discharged into the liquid outlet pipe 2, pushing the baffle 6 to slide and compress the spring 9 to discharge. When the liquid flows back, the backflow pressure is greater than the discharge pressure of the valve body 1, and the spring 9 pushes the baffle 6 to block the liquid receiving funnel 3, thereby reducing the probability of the liquid at the bottom of the liquid outlet pipe 2 flowing back to the valve body 1. When the spring 9 appears elastic fatigue, the adjusting handle bolt 8 is turned to drive the sliding plate 7 to slide, so as to increase the compression of the spring 9 to compensate for the sealing effect of the baffle 6 on the liquid receiving funnel 3.

[0030] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0031] The present invention is not limited to the above-mentioned implementation modes. Anyone should be aware of the structural changes made under the inspiration of the present invention. Any technical solution that is the same or similar to the present invention falls within the protection scope of the present invention. The technology, shape, and structure that are not described in detail in the present invention are all known technologies.

Claims

1. A backflow-proof fire-blocking breathing valve, characterized in that: include: A valve body (1) is provided, wherein a liquid outlet pipe (2) is threadedly engaged at a liquid outlet of the valve body (1), a liquid receiving funnel (3) is fixed inside the liquid outlet pipe (2), a guide barrel (4) is connected inside the liquid outlet pipe (2), a sliding rod (5) is slidably engaged inside the guide barrel (4), a baffle (6) corresponding to the liquid receiving funnel (3) is provided at one end of the sliding rod (5) extending out of the guide barrel (4), a sliding plate (7) is slidably engaged inside the guide barrel (4), an adjusting handle bolt (8) threadedly engaged with the sliding plate (7) is rotatably engaged at the bottom end of the guide barrel (4), and a spring (9) is provided between the sliding plate (7) and the sliding rod (5).

2. The anti-backflow fire-blocking breathing valve according to claim 1 is characterized in that: The baffle (6) is a truncated cone-shaped structure, the spring (9) is sleeved on the adjusting handle bolt (8), and the liquid receiving funnel (3) is an inverted hollow truncated cone-shaped structure.

3. The anti-backflow fire-blocking breathing valve according to claim 1 is characterized in that: A plurality of reinforcing rods (10) are provided between the guide barrel (4) and the inner wall of the liquid outlet pipe (2), and the plurality of reinforcing rods (10) are arranged in a circular array between the guide barrel (4) and the inner wall of the liquid outlet pipe (2).

4. The anti-backflow fire-blocking breathing valve according to claim 1 is characterized in that: A retaining ring (11) is provided on the outer fixed sleeve of the guide barrel (4), and the height of the upper side of the retaining ring (11) gradually decreases from the inner wall to the outer wall.

5. The anti-backflow fire-blocking breathing valve according to claim 1 is characterized in that: The sides of the sliding plate (7) and the sliding rod (5) are both provided with guide notches (12), the inner wall of the guide barrel (4) is provided with guide strips (13), and the sliding plate (7) and the sliding rod (5) are slidably fitted on the guide strips (13) through the guide notches (12).

6. The anti-backflow fire-blocking breathing valve according to claim 1 is characterized in that: A mounting hole is provided at the bottom end of the guide barrel (4), a bearing (401) is provided in the mounting hole, a smooth curved surface is provided on the outer side of one end of the adjusting handle bolt (8), and one end of the adjusting handle bolt (8) is fixed in the bearing (401).

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